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✨ Transform your outdoor space—fast, safe & spotless! 🌿
HG Algae & Mould Remover is a concentrated 1L biocide designed to quickly eliminate algae, mould, lichen, and fungus from a wide range of outdoor surfaces including stone, concrete, tiles, and wood. Delivering visible results within 36 hours, it covers up to 200m² per bottle and, when diluted properly, is safe for surrounding plants and grass. This fast-acting cleaner not only restores but also helps prevent regrowth, making it the go-to solution for maintaining pristine patios, paths, and exterior areas.
















| ASIN | B000IU3VTE |
| Active Ingredients | AQUA, DIDECYLDIMONIUM CHLORIDE, ISOPROPYL ALCOHOL |
| Active ingredients | AQUA, DIDECYLDIMONIUM CHLORIDE, ISOPROPYL ALCOHOL |
| Best Sellers Rank | 16,267 in Garden ( See Top 100 in Garden ) 72 in Moss Control 7,923 in Home Care & Cleaning |
| Brand | HG |
| Brand Name | HG |
| Coverage | Broad-spectrum coverage for moss, algae, and mould |
| Customer Reviews | 4.3 out of 5 stars 409 Reviews |
| Global Trade Identification Number | 08711577002916 |
| Included Components | HG Algae and Mould Remove |
| Item Form | Liquid |
| Item Weight | 848 g |
| Item form | Liquid |
| Item weight | 848 g |
| Liquid Volume | 1000 Millilitres |
| Liquid volume | 1000 Millilitres |
| Manufacturer | HG Hagesan (UK) Ltd |
| Model Number | 181100106 |
| Number of Packs | 1 |
| Part Number | 181100106 |
| Unit Count | 1000.0 millilitre |
A**R
Great result with a brush.
Very effective on patio tiles but better to use with a brush to scrub the tiles.
A**N
Better than expected
Reading the other reviews you wouldn't think this would work well however i used it on my stone flags with good results. Definitely cleaner and has killed the algae . First i treated with ratio as described so 1:20, then i think i used 1:10 for flags with excessive algae. I know i'll have to retreat in 6 months or so but will do nicely for now. also used on a fence but probs needs another spray as it hasnt all cleared..
J**M
Does a good job of removing algae, but not a dedicated "cleaner"
Decent product, our patio gets so slippery with algae and surface dirt it's a real hazard. This product makes the surface safe again. I wouldn't say it's the best cleaner as the patio still looks a bit stained, but I will find something else for that. Priority was to get rid of the slipperiness.
C**D
good cleaner
Arrived fast and as described.
G**Y
Will buy again
Very good works well
P**N
Green algae on patio York stone slabs
I applied the algae remover diluted to manufacturers suggestion via my watering can sprinkler. It was quite dark green in parts. After 2-3 days it was lighter but still green. So I repeated the process. Have to be sure get 3 dry days in a row. Again better but definitely not gone. Am on 3rd application to date. Also tried it on front path which was lightly affected by moss & algae. Made no difference. Used whole bottle. Will buy something else in the hope it works better. Maybe this stuff is for light areas of algae? Didn’t work for me.
J**A
Yo
I think it works well 👌 I watered the full patio with water (using karcher) before use. Than i mix it with water as was describedribed. Brush it into my paving and leave it overnight. The next day I splash it out with karcher. I doubt it would work so well if i wouldnt have a powerful tool..
A**H
Mould removal
Good product took some time to arrive
Trustpilot
1 month ago
1 month ago